t/t5100-mailinfo.sh: use the $( ... ) construct for command substitution

diff --git a/t/t3600-rm.sh b/t/t3600-rm.sh
index 9d90d2c935bcd3d4dc745287a9068395cb2b3d93..2e47a2bfd8c99988d536483a0c01d8b81396c5b5 100755 (executable)
--- a/t/t3600-rm.sh
+++ b/t/t3600-rm.sh
@@ -115,7 +115,7 @@ test_expect_success '"rm" command printed' '
        git add test-file &&
        git commit -m "add file for rm test" &&
        git rm test-file > rm-output &&
-       test `grep "^rm " rm-output | wc -l` = 1 &&
+       test $(grep "^rm " rm-output | wc -l) = 1 &&
        rm -f test-file rm-output &&
        git commit -m "remove file from rm test"
 '
@@ -125,7 +125,7 @@ test_expect_success '"rm" command suppressed with --quiet' '
        git add test-file &&
        git commit -m "add file for rm --quiet test" &&
        git rm --quiet test-file > rm-output &&
-       test `wc -l < rm-output` = 0 &&
+       test $(wc -l < rm-output) = 0 &&
        rm -f test-file rm-output &&
        git commit -m "remove file from rm --quiet test"
 '